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What in the world is pH?

gibran_333_tru — 2014-04-10 14:18:39 UTC

pH is the measure of the acidity or basicity of an aqueous solution by total amount of the solution

The one to blame!!

alysharawrz123 — 2014-04-10 14:18:54 UTC

This guy is the one to blame. He came up with the term pH and the pH scale.

Soren Peder Lauritz...

(1868-1939)

Who has the time and effort to come up with this stuff?!

alysharawrz123 — 2014-04-10 14:19:24 UTC

The concept of pH was first introduced by Danish chemist

Soren Peder Lauritz at the Carls Labrotory in 1909.

pH:

alysharawrz123 — 2014-04-10 14:26:19 UTC

pH is defined as the decimal logarithm

of the reciprocal of the hydrogen ion

activity.

pH= -log10(aH+) = log10(1/9H+)

alysharawrz123 — 2014-04-10 14:34:29 UTC

Examples of pH scale, and how it works

alysharawrz123 — 2014-04-10 14:37:24 UTC

The pH scale is a logarithmic and because of this, each whole pH value below 7 is ten times more acidic than the next higher value.

Example: pH 4 is ten times more acidic than pH 5 and ten times more amore acidic than pH 6 ( 10 times 10)

The pH scale measures how acidic or basic a substance is. the pH scale ranges from 0 to 14.
A pH of 7 is neutral, a pH less than 7 is an acid, and a pH more than 7 is a base.

Acid- A chemical substance that neutralizes alkalis, dissolves some metals and turns litmus paper red. Has a sour taste.

Base- A substance that is slippery, tastes bitter and changes litmus paper blue. It reacts with acids to form salt.

Examples of Acids:

alysharawrz123 — 2014-04-10 14:38:42 UTC

Some examples of acids that we use in out daily lives are...

Benzoic acid which is salt used to preserve food.
Carbonic acid which is used to make carbonated drinks.
Ethanoic acid which is vinegar.
Hydrochloric acid which is used for household cleaning, pool cleaning

and to clean metals.

Sulphuric acid which is used for detergent and to make soft drinks.

Sources:

alysharawrz123 — 2014-04-11 14:09:55 UTC

http://berryberryeasy.com/2011/07/spm-chemistry-form-4-notes-acids-and-bases-part-2/

http://en.wikipedia.org/wiki/PH

http://www.chemtutor.com/acid.htm

http://www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/electrochemistry/sorensen.aspx

Examples of Bases:

alysharawrz123 — 2014-04-11 14:15:57 UTC

Some examples of bases that we use in our daily

lives are..

Ammonia which is used to manufacture

nitric acid.

Aluminum hydroxide which is used to make

gastric medicine.

Calcium hydroxide which is used to make

cement and the used for the application of sewage treatment.

Sodium hydroxide which is used in the manufacture of

soaps, cleaners and detergents.